EP9 6.5" 9mm
As low as
$469.00 - $549.00
New
Extar
EP9 6.5" 9mm MDB
SKU:
EP2001
Availability:
SHIPS WITHIN 7 DAYS AFTER FFL VERIFICATION (We do not ship to: CA, CT, DE, HI, IL, MA, MD, NJ, NY, WA, PR, GU, DC.)
As low as
$569.00
EP9 6.5" 9mm MDB
New flagship · Modern Delayed Blowback
We replaced mass with timing.
MDB is Extar’s Modern Delayed Blowback system. The EP9 earned its reputation by taming 9mm with mass — a steel buffer, a urethane damper, and a spring doing the hard work at the back of the receiver. The EP9-MDB does it with timing instead. A mechanical delay system holds the bolt closed until pressure drops, so the action no longer depends on sheer weight. Less reciprocating mass, a softer, flatter impulse. Everything that made the EP9 reliable stays, because the proven bolt and barrel geometry carries over unchanged. Like everything we build, it’s engineered for simplicity, reliability, longevity, and value.
Lightweight Polymer Build
Modern Delayed Blowback
Glock Magazine Compatible
M-LOK Handguard
Picatinny Compatible Top Rail
BlackNitride+ Bolt & Barrel
How it works
Mass versus timing
Every blowback pistol has to solve the same problem: keep the bolt shut long enough for chamber pressure to fall. There are only two ways to do it — make the bolt heavy, or make it wait.
Standard EP9
Direct blowback
The bolt is held closed by its own mass and spring pressure alone. Simple, proven, and utterly dependable — but 9mm pressure demands real weight to do it, and that weight has to stop somewhere. The EP9 handles it with a steel buffer and urethane damper at the rear of the receiver.
Heavier bolt group
Sharper rearward impulse
More firearm movement during operation
MDB
Delayed blowback
A mechanical delay system briefly resists the bolt opening until chamber pressure drops, so the action stops relying on sheer mass. Less reciprocating weight moves through the gun, operation flattens out, and the recoil impulse is softened.
Lighter bolt group
Flatter, softer impulse
Delay loading on the bore centerline
Location
Away from the breech
Common mechanical delay systems put their components near the barrel breech, exposed to heat, gas fouling, and particulate contamination. We located the entire MDB delay system as far from those elements as possible. It runs cool and clean, for far lower maintenance, increased reliability, and greater longevity.
Alignment
On the bore centerline
MDB applies delay loading exactly on the bore centerline. A delay system above the centerline loads the bolt off-axis, which inevitably wears the receiver and affects consistent operation and service life. MDB eliminates it.
EP9 or EP9-MDB?
Same barrel, same magazines, same handling. The difference is at the back of the receiver.
Operating system
EP9
Direct blowback with Advanced Recoil Impulse Damping System
EP9-MDB
Modern Delayed Blowback — mechanical delay system on the bore centerline
Weight (unloaded)
EP9
4 lbs.
EP9-MDB
3 lbs. 14 oz.
Felt recoil
EP9
Soft for a 9mm blowback — damped by buffer and urethane
EP9-MDB
Flatter and softer again — less reciprocating mass to move
Capacity / magazines
EP9
Glock-pattern, up to 33rd
EP9-MDB
Glock-pattern, up to 33rd — unchanged
Price
EP9
From $469 · the value pick
EP9-MDB
From $569
Not sure which?
If you want the most gun for the money, the standard EP9 is still the value pick and still shoots soft. Choose EP9-MDB if you want the flattest, lightest-cycling EP9 we build.
Specifications
EP9-MDB 6.5" 9mm · Designed, machined, and assembled in Lake Havasu City, Arizona
- Caliber
- 9x19mm Luger
- Operating System
- Modern Delayed Blowback (MDB), mechanical delay
- Recoil System
- MDB delay system, loaded on bore centerline
- Lubrication
- Delay system pre-lubricated; relube every 2,000 rds. Bolt and upper require none.
- Capacity
- Up to 33rd
- Included Magazine
- 1x18rd or 1x10rd
- Barrel Length
- 6.5" (165mm)
- Barrel Thread
- 1/2-28"
- Overall Length
- 23.75" (603.25mm)
- Overall Length (with Stabilizer)
- 25.1" (638.17mm)
- Overall Height
- 7.9" (200.66mm)
- Overall Width
- 2" (50.8mm)
- Weight (Unloaded)
- 3 lbs. 14 oz. (1757g)
- Weight (with Empty Magazine)
- 3 lbs. 15.6 oz. (1804g)
- Bolt & Barrel Finish
- BLACKNITRIDE+
- Trigger Action
- Single-stage
- Charging Handle
- Non-reciprocating
Weight
Lighter Where It Counts
The mechanical delay system means the bolt no longer needs sheer mass to do its job. The result is an EP9 that hangs better on a sling, comes up faster, and stays easier through a long range session. We have been building lightweight firearms for close to thirty years, and this is the lightest-cycling EP9 yet.
Operation
Smoother Through the Cycle
With less reciprocating mass slamming rearward, the gun settles faster between shots. Instead of a buffer and urethane damper absorbing the bolt's energy, the delay system holds the bolt until pressure falls. Strings feel flatter, and the sight picture comes back on its own while moving far less.
Compatibility
Glock Magazines? Still Yes.
The Glock-pattern magazine is the most common and widely available 9mm magazine in the United States, and nothing about the MDB changes that. Same magazines as your sidearm, same Last-Round-Hold-Open we were first to patent for Glock magazines in PDWs, same collection you already own.
M-LOK
Plenty of Room for Accessories
Our M-LOK handguard carries nine M-LOK slots for a flashlight, laser, or angled foregrip — no rough rails to interfere with the shooter's grip. It extends past the muzzle and top rail to allow an easy full C-Clamp grip. Unchanged from the standard EP9, because it was already right.
Optics Ready
A Full-Length Rail
The top of the receiver sports a full-length picatinny-style rail with plenty of forward real estate for switches or lasers, at the right height for low optic mounts. Every sight and optic that fits your EP9 fits this one.
BlackNitride+
Long Lasting & Easy to Maintain
The bolt, barrel, and ejector are all treated with BLACKNITRIDE+. This finish hardens the steel's surface and gives it lubricity, making the bolt and barrel long-lasting, easy to clean, and free of any need for lubrication. As with our original EP series, the bolt and upper receiver need no lubrication for best operation and longevity, just sensible cleaning intervals. The MDB delay system ships pre-lubricated from the factory and needs relubrication only every 2,000 rounds.
Adjustable Receiver Extension
Brace Today. Stock Tomorrow. Same Tube.
Every EP9-MDB ships with our ARE (Adjustable Receiver Extension) installed, and it’s the same tube whether you order the Extar Stabilizer, the SB Tactical SBA3, or no brace at all. It universally accepts a wide variety of arm braces and adjustable stocks. If you decide you want a stock, it fits on the exact same tube your brace came on. No new receiver extension needed.
Note: fitting a stock to a pistol with a barrel shorter than 16" makes it a short-barreled rifle under the National Firearms Act. Register it with the ATF (Form 1) before installing a stock, and check your state and local laws.
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